CVE-2025-38429

Host data corruption via premature read-pointer update

Published Jul 25, 2025 · Updated Aug 5, 2026

Race condition in the Linux kernel MHI endpoint ring allows attackers to corrupt host data during MHI event handling. mhi_ep_ring_add_element publishes rd_offset before writing the buffer, so the host can consume an uninitialized or incomplete ring element. Triggering the path requires privileged kernel-level access to an MHI endpoint controller and hardware-internal PCIe DMA timing that userspace cannot invoke or influence.

CVSS severity10.0
Critical
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in the Linux kernel MHI endpoint ring allows attackers to corrupt host data during MHI event handling. mhi_ep_ring_add_element publishes rd_offset before writing the buffer, so the host can consume an uninitialized or incomplete ring element. Triggering the path requires privileged kernel-level access to an MHI endpoint controller and hardware-internal PCIe DMA timing that userspace cannot invoke or influence.

The record

CVE
CVE-2025-38429
Published
Jul 25, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-908
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jul 25, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.19
  2. Affected versionversion=bbdcba57a1a26a4439a4f4ecdbfaf80a10fd8f34 <0007ef098dab48f1ba58364c40b4809f1e21b130
  3. Affected versionversion=bbdcba57a1a26a4439a4f4ecdbfaf80a10fd8f34 <44b9620e82bbec2b9a6ac77f63913636d84f96dc
  4. Affected versionversion=bbdcba57a1a26a4439a4f4ecdbfaf80a10fd8f34 <6f18d174b73d0ceeaa341f46c0986436b3aefc9a
  5. Affected versionversion=bbdcba57a1a26a4439a4f4ecdbfaf80a10fd8f34 <f704a80d9fa268e51a6cc5242714502c3c1fa605

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=5.19; version=bbdcba57a1a26a4439a4f4ecdbfaf80a10fd8f34 <0007ef098dab48f1ba58364c40b4809f1e21b130; version=bbdcba57a1a26a4439a4f4ecdbfaf80a10fd8f34 <44b9620e82bbec2b9a6ac77f63913636d84f96dc; version=bbdcba57a1a26a4439a4f4ecdbfaf80a10fd8f34 <6f18d174b73d0ceeaa341f46c0986436b3aefc9a; version=bbdcba57a1a26a4439a4f4ecdbfaf80a10fd8f34 <f704a80d9fa268e51a6cc5242714502c3c1fa605

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
10.0kernel.orgCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-908Use of Uninitialized Resource

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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